GRUNDFOS SCALA2 Domestic Booster Pump Owner’s Manual
- July 23, 2024
- GRUNDFOS
Table of Contents
GRUNDFOS SCALA2 Domestic Booster Pump
Product Information
Specifications
- Product Name: SCALA2
- Application: Domestic water supply booster
Product Usage Instructions
Installation Check List
Before installing the SCALA2, make sure to go through the following checklist:
- Check the meter size to ensure it is suitable for the home’s water demand.
- Verify the supply line diameter and length are adequate for optimal performance.
- Protect the system from freezing to prevent damage.
Important Note on Expansion Tank
It is crucial to isolate the expansion tank from the plumbing system before
measuring or adjusting its pressure. Always remove it before pressurizing the
system.
External Supply
Domestic boosters cannot compensate for undersized meters and water lines. Increasing pressure does not increase volume. Ensure the incoming volume is sufficient for the demand of the home.
- Meter size
- Supply line diameter and length
- Protection from freezing
Internal System
- A properly sized thermal expansion tank or equivalent is required for tank heater systems.
- System Expansion Tank (provided by others) precharge adjusted to new boost static pressure. *
- RO systems must be down stream of booster.
- 12”- 15” of open space in front of the Scala 2 unit is required
- 1” x 24” Braided flexible connection lines. Do not kink.
- Scala unit is securely mounted to the floor.
- Min 10” straight pipe to suction port.
- No hard 90º fittings (use sweeps) after 10” straight pipe.
- Avoid PEX insert fittings smaller than 1″ at or near the pump.
- Min 24” before transition to smaller diameter pipe
- No pipe dope or hard sealants on poly threads
- Hand tight unions. No tools.
- Pump is fully primed before activation. Approximately .5 gal.
- Scala unit is not connected to a GCFI outlet.
- Water hammer protection may be necessary.
- Scala 2 internal tank set to 70% new static pressure. (See Graphic)
Expansion tank pressures can only be measured and adjusted when the tank is isolated from the plumbing system. Remove before pressurizing.
FAQ
Q: Can a domestic booster compensate for undersized meters and water
lines?
A: No, increasing pressure with a booster does not increase volume. Ensure the
incoming volume meets the home’s demand.
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